The Uni-Ball Signo Broad UM-153 Gel Rollerball Pen Blue features a premium, high-density pigment ink fluid writing system. Tamper-proof, acid-free Uni Super Ink forms an archival bond. It completely resists water damage, fading, and chemical document fraud. A durable 1.0mm stainless steel tip creates extraordinarily bold lines. The highly opaque ink shows up vividly on light or dark paper. An ergonomic rubberized sleeve guarantees a comfortable, slip-free hand grip. It delivers a skip-free, exceptionally smooth glide for creative design signatures.